Friction draft-rigging.



11%. 837,533. V PATENTED DEC. 4, 1906.

H.'SASPB R & 0. B. BORYESON. FRICTION DRAFT RIGGING. APPLICATION FILED APR. 3, 1906.

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QNTOR IL i M S m 81W w @m p PATENTED DEC. 4 1906. H.-ASPER & G B. BORYBSON. FRICTION DRAFT RIGGING.

APPL IGATION FILED APR. 3, 1906.

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PATENT curios.

UNITE sra rns HALFDAN ASPER AND CHARLES B.

BORYESON, OF BUTLER, PENNSYL- VANIA.

FRICTION DRAFT-RIGGlNG-.

Specification of Letters Patent.

Patented Dec. 4, 1906.

Application filed April 3, 1906. Serial No. 309,655-

1T0 all whom it may concern:

and advantages hereinafter described and claimed.

In the accompanying drawings, Figural is a plan view of our draft-gear. Fig. 2 1s a vertical -longitudinal sectionv through the same. on the line 2 2, Fig. 1. Fig. 3 is a transverse section on the line 3 3, Fig. 1. Fig. 4 is a lon "tudinal section through-the outer or main iction member. Fig. 5 is a transverse section of the same on the line 5 '5, Fig. 4. Fig. 6 is a plan view of one of the top or bottom internal friction-plates. Fig- 7 s a longitudinal section through the same. Fig. '8 is in part an end view'aiid in part a transverse section of the same on the line 8 8, Fig.' 6. Fig. 9 is a face view of one of the side internal friction-plates. Fig. 10 is an edge view of the same. Fig. 11 is in part an end view and in part a'transverse section of the same on the line'll 11, Fig. 9. 'Fig. 12 is a longitudinal section of the wedge-block. Fig. 13 is a plan view of the same. Fig. 14 is a perspective view of one of the ant1f1iction-rollers, and Fi 15 is a similar view of one of the friction-1i s.

Our friction draft-gear is adapted to be applied to any construction or type of railway-car, and while the drawings show the same applied to a steel underframe it will be understood that this is illustrative merely.

In the drawings the body-bolster is indicated at 1, the draft-beams at 2, and the end sill at 3. All of these parts are shown as of standard steel construction. The end sill is provided with a buffer-casting 4, having an o ening 5, through which passes a couplers iank 6, said coupler-shank being supported by the an le-bar 7, as is the usual custom.

Riveted to the inner faces of the draftbeams are the front draft-lugs 8 and the rear draftlugs9,-which are or may be of any desirable construction, those shown bein castings. Preferably, however, these dra t-lugs are provided with top projecting portions 10, which overhang the draft-gear and pre vent the same from jumping out under the jolting of the train. The draft-gear is prevented from dropping down by the cross supporting members 11, shown as castin s', which are secured to the lower flanges of t e draft-beams.

' Bearing normally against the rear draftlugs 9 is a follower-plate 13, which is arranged to be engaged by the strap or yoke 14, having its forward ends bent inwardly, as at 15, to enga e a head 16 on the couplershank, to whic head said yoke-is suitably secured, as bymeans of rivets 17. These parts are old and their function and mode of operation'arewell understood.

The friction-gear itselfcomprises a main or outer friction member 20, preferably rectangularincross-sectionandbeing,inefiect,abox having a top Wall 21, bottom wall 22, side walls 23, and front end wall 24 and being open at its rear end. The front end of this friction member bears against the head 16 on the coupler-shank and normally also bears against the front draft-lugs 8. It is rovided on all four inner faces with longitu inal ribs '25. Cooperating with this main friction member are four-internal friction-platesnamely, top plate 26, bottom'plate 27, and two side plates 28. The top and bottom plates are similar in construction, and oath thereof is provided on its, inner face withan incline or wedge 26", with which 006 erates the wedge-block 29. This wedgeock is preferably provided with seats for receiving antifriction-rollers 30, which prevent the same from sticking between the top and bottom friction-plates. Saidwedge-block is provided on its forward and rear faces with centering-lugs 31 for the springs 32 33 34 35,

The top and bottom plates are provided with inwardly-projecting webs 38, having on:

which are interposed between said wedge- 1 are rovi ed with longitudinal ribs 42, and to longitudinal ribs friction-(plates are forced outwar their outer faces inclined portions 39, which bear a ainst corresponding inclined portions 40 on the inner faces of the side friction-plates 28; From Fig. 3 it is evident that when the top and bottom plates are moved, respec-' tively,

thus forcing the side friction-plate 28 outwardly. i I

The to bottom, andsidefriction-plates in unison.

plates themselves.

\ The operation of ourdra'ft-gear is substantially the same as in prior devices. Under tugging strains the outer friction member rests against the front draft-lugs 8 and is therefore the stationary member. The drawbar by means of the yoke 14 draws the follower-plate 13 forwardly, thus compressing the springs 34 35 and forcing the wedge-block 29 between the inclined faces on the top and bottom. friction-plates. Conse uently s'aid lythat is, up and own, respectively, and into firm fric tional engagement with theribbed inner faces of the outer friction member 20. This cutward movement of the .top and bottom friction-plates through the contacting inclined faces 39 and 40 on said top and bottom plates and side plates, respectively, also forces the side plates 28 outwardly and into firm frictiona en agement with the ribbed inner side faces of the outer member 20. Consequently a strong frictional engagement is secured on all sides of the friction members.

Under bufiing strains the rear followerplate 13 is in contact with the rear draft-lugs 9 and becomes the relatively stationary portion, while the draw-bar forces the outer friction member 20 to the rear, thus carrying the friction-plates backwardly over the wedgeblock 29 and producing the same expansion of the internal friction-plates as is above described.

The friction mechanism illustrated is simple and cheap of construction and provides a For instance,

maximum amount of friction-surface, and the efficiency is correspondingly high. There are'no parts which are liable to derangement ordisplac'ement, and the device possesses great durability under severe uses.

It is obvious that changes may be made in the details of construction and arrangement.

the top, bottom, and side fricup and down the inclined faces 39 Will- .ride up and down on the inclined faces 40,

tion-plates might be reversedthat is, inwardly-inclined projections might be formed .on the side'plates instead of on the top and bottom plates. The effect would be the same as though the rigging What we claim is were rotated a quarter-turn on its longitudinal axis.

1. In friction draft mechanism, the combination of an outer friction member, two pairs of oppositelyfacing inner frictionplates, .means for expanding one pair of said plates,

and connections between the two pairs whereby the ex ansion'of one pair causes the expansion o the other pair.

2. In friction draft mechanism, the combination of an outer rectangular friction member provided with internal friction-faces, a pair of friction-plates oppositely arranged and provided with inclines on their inner faces and with transverse inclines, a wedgebock engaging'the inclines on the inner faces 0 s'ame,'and two other friction-plates provided with transverse inclines on their inner faces arranged to contact with the transverse inclines on the first-named plates.

said plates and arranged to expand the 3. In friction draft mechanism, the combination of an outerrectangular friction member provided with four internal ribbed friction-faces, two pairs of oppositely-facing ribbed friction plates cooperating with the ribbed friction-faces of the outer member, one pair of. said friction-plates being provided with internal inclined faces, a wedgeblock cooperating with and serving to expand said plates, and coopcrating inclined faces on the two pairs of friction-plates whereby one pair also expands the other.

4. In friction draft mechanism, the combination of a rectangular internally-ribbed outer friction member, site'ly-facing externally-rib bed frictionplates,

means for expanding one pair of said plates,

and connections between the two pairs whereby the expansion of the one pair causes the expansion of the other pair.

5. In friction draft mechanism, the combination of an outer friction member provided with internal longitudinal ribs, a pair of oppositely-facing ribbed frictifin-plates cooperating therewith, a wedge-block arranged to expand said friction-plates, another pair of friction-plates ribbed externally and cooperating with the outer friction member, and cooperating wedge-faces on said frictionplates whereby the expansion of the one pair causes the expansion of the other pair.

6. In friction draft mechanism, the combination of an outer friction member provided with internal friction-faces, a pair of frictionplatos .:ooperating therewith, means for expanding said friction-plates under buffing and tugglng strains, lnclined faces on saidfiic'tion-plates arranged at right angles to said inclined faces the expansion of the two pairs of oppo- IIO "their fi'ictioii-faces and to the axis thereof, 9. DAN ASPER and CHARLES B. Boit'msoN, have second pair of Motion-plates. provided with hereunto set our hands.

transverse inclines on their inner faces which cooperate with the wedges on the first-named 5 friction-plates whereby the expansion of the first-mentioned friction-plates causes the ex- Witnesses: pension of the senond pair of friction-plates. ROBERT C. MoABoY, In testimony whereof we, the said HALF- JACOB M. PAINTER. 

